I've noticed a knocking noise coming from my BMW Z4's engine. It seems to happen when I start the car or when it's idling. What could be causing this and how can I fix it?
ReplyFirst, check your oil levels. Low oil can cause knocking noises from the engine. If your oil levels are fine, it could be a sign of a more serious engine issue.
It's possible that your spark plugs need to be replaced. Worn or fouled spark plugs can cause knocking noises. You should also get your fuel injectors checked.
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